3:6 Paul introduced the words that follow to help the readers realize that obedience was essential. This was a command given with the full authority of the Lord Jesus Christ. The faithful majority in the church were to separate, probably individually and socially, from the unruly to alert the offenders to the fact that their behavior was not acceptable. The desired result was that they would repent. Paul had earlier warned those who were idle (1 Thess. 5:14), but evidently they had not responded. Now firmer measures were necessary (cf. Matt. 18:15-17). The offenders constituted a minority who lived undisciplined lives contrary to the teaching and example of the missionaries.
"The tradition to which Paul refers has a twofold character, as vv. 7-12 indicate. In vv. 7-9 the apostle elaborates on his and his colleagues' example as a guide for responsible behavior for their converts. The introductory words of v. 7 reveal that his and his fellow missionaries' behavior was intended to have the normative character of a received tradition. In addition, as a matter of course, Paul issued ethical instruction to new converts in order to regulate their behavior as Christians. In v. 10 he cites the specific tradition involved with regard to work."68
3:7-9 Evidently some in the church were not working to support themselves but were living off the charity of their brethren. In Thessalonica as elsewhere Paul and his companions sometimes supported themselves by "making tents"to give their converts an example of responsible Christian living (cf. 1 Cor. 9:3-14; 1 Tim. 5:18). They had the right to receive monetary support in payment for their spiritual ministry (Gal. 6:6), but they often gave up this right for the greater needs of their converts.
3:10 Paul reminded his readers of his well-known instruction that he frequently repeated when he was with them. If anyone refused to work, his brothers and sisters in Christ should not provide for him. The idle in this case were not unable to work but unwilling to work.
